Worksheet 316 · Skill 5

Set and drift

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1. At 1135 your fix is 055°T, 4.1 nm from Westfield church spire. You steer 151°T at 7.9 kn through the water. At 1230 a new fix puts you 028°T, 2.1 nm from Mill stack.

   Plot the 1230 DR, then find the current: set (the true direction the water moved you, from the DR to the fix) and drift (its speed in knots over the 55 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

2. At 0945 your fix is 060°T, 2.4 nm from Westfield church spire. You steer 118°T at 7.2 kn through the water. At 1020 a new fix puts you 236°T, 1.8 nm from Tern Island tower.

   Plot the 1020 DR, then find the current: set (the true direction the water moved you, from the DR to the fix) and drift (its speed in knots over the 35 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

3. At 0955 your fix is 053°T, 2.9 nm from Westfield church spire. You steer 070°T at 4.0 kn through the water. At 1025 a new fix puts you 298°T, 3.6 nm from Tern Island tower.

   Plot the 1025 DR, then find the current: set (the true direction the water moved you, from the DR to the fix) and drift (its speed in knots over the 30 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

4. At 1550 your fix is 299°T, 2.4 nm from Tern Island tower. You steer 173°T at 5.9 kn through the water. At 1625 a new fix puts you 055°T, 3.1 nm from Heron Point Light.

   Plot the 1625 DR, then find the current: set (the true direction the water moved you, from the DR to the fix) and drift (its speed in knots over the 35 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

5. At 1110 your fix is 074°T, 3.0 nm from Westfield church spire. You steer 051°T at 5.1 kn through the water. At 1150 a new fix puts you 306°T, 3.1 nm from Tern Island tower.

   Plot the 1150 DR, then find the current: set (the true direction the water moved you, from the DR to the fix) and drift (its speed in knots over the 40 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

6. At 0930 your fix is 319°T, 2.2 nm from Tern Island tower. You steer 196°T at 8.3 kn through the water. At 1020 a new fix puts you 014°T, 1.2 nm from Mill stack.

   Plot the 1020 DR, then find the current: set (the true direction the water moved you, from the DR to the fix) and drift (its speed in knots over the 50 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

7. At 1325 your fix is 222°T, 2.3 nm from Gannet Rock daybeacon. You steer 053°T at 5.2 kn through the water. At 1415 a new fix puts you 076°T, 2.4 nm from Gannet Rock daybeacon.

   Plot the 1415 DR, then find the current: set (the true direction the water moved you, from the DR to the fix) and drift (its speed in knots over the 50 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

8. At 1255 your fix is 037°T, 2.6 nm from Gannet Rock daybeacon. You steer 206°T at 8.3 kn through the water. At 1325 a new fix puts you 297°T, 2.0 nm from Kittle water tank.

   Plot the 1325 DR, then find the current: set (the true direction the water moved you, from the DR to the fix) and drift (its speed in knots over the 30 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn